San Juan Water Temperature

(Today) 2025

28.6°C / 83.4°F

The water will feel hot. Water temperature similar to a heated indoor swimming pool.

*Live data from San Juan, PR: 28.6°C / 83.5°F

Current weather

24°C / 76°F
(broken clouds)
Partly cloudy
Wind
9 mph
Humidity
93%

The measurements for the water temperature in San Juan, San Juan are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

*Live data may vary from satellite readings for a number of reasons. These include local factors, depth of smapling and time of day.

Water temp by month

Monthly average max / min water temperatures

The graph below shows the range of monthly San Juan water temperature derived from many years of historical sea surface temperature data.

San Juan average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in San Juan
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 25.4 24.9 25.4 25.5 26.4 27.1 27.4 28.2 28.5 28.2 28 27
Max °C 27.3 26.8 26.4 27.7 28 29.1 29.6 29.8 30.2 29.8 29 28.3
Min °F 78.4 77.5 78.1 78.8 80.2 81.6 82.2 83.4 83.9 83.4 82.8 81.1
Max °F 80.3 79.4 79.1 81 81.8 83.6 84.4 85 85.6 85 83.8 82.4

The warmest water temperature is in September with an average around 84.7°F / 29.3°C. The coldest month is February with an average water temperature of 78.4°F / 25.8°C.

7 day tide forecast for San Juan

TueWedThuFriSatSunMon
  • Low 6:35am
    (0.1m)
  • High 12:21pm
    (0.36m)
  • Low 6:08pm
    (0.1m)
  • High 12:34am
    (0.47m)
  • Low 7:08am
    (0.06m)
  • High 1:27pm
    (0.41m)
  • Low 7:18pm
    (0.14m)
  • High 1:11am
    (0.42m)
  • Low 7:46am
    (0.02m)
  • High 2:34pm
    (0.45m)
  • Low 8:35pm
    (0.17m)
  • High 1:51am
    (0.37m)
  • Low 8:28am
    (-0.02m)
  • High 3:41pm
    (0.49m)
  • Low 9:58pm
    (0.19m)
  • High 2:36am
    (0.32m)
  • Low 9:17am
    (-0.06m)
  • High 4:46pm
    (0.53m)
  • Low 11:20pm
    (0.19m)
  • High 3:28am
    (0.28m)
  • Low 10:10am
    (-0.09m)
  • High 5:50pm
    (0.55m)
  • Low 12:34am
    (0.18m)
  • High 4:28am
    (0.26m)
  • Low 11:08am
    (-0.11m)
  • High 6:50pm
    (0.57m)
7 day tide times for San Juan

*These tide times are estimates based on the nearest accurate location (San Juan, Puerto Rico) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.